Typewriter for printing with the aid of heat



H. RESCH TYPEWRITER FOR PRINTING WITH THE AID OF HEAT Filed Aug. 10, 1946 July l8, 1950 5 Sheets-Sheet 1 mm 3 Q INVENTOR HE/VR V R ESCl-l ATTORNEYS July 18, 1950 H. REscH TYPEWRITER FOR PRINTING WITH THE AID OF HEAT Filed Aug. 10, 1946 s Sheets-Sheet 2 FIG.3

- INVENTOR HENRY RESCH ATTORNEYS July 18, 1950 H. RESCH 2,515,381

TY PEWRITER FOR PRINTING WITH THE AID OF HEAT Filed Aug. 10, 1946 3 Sheets-Sheet 3 F|'s.4 1' L 1.4 54% FIG-.5 FlG.6 K

lNVENTOR Hf/VRK RESCH BY wlewm ATTORN EYS Patented July 18, 1950 ryrnwnrrnnnon PRINTING WITH THE AID OF HEAT- ,Resoh, Bayonne, N. J., ,assignor to Ralph -G. tCoyxhjead Corporation, New York, N. Y., a

corporation of "Delaware Application August 1 0, 1946,- Serial 539353 14 Q aiims- 1 lhis invention relates to ztypewritera Certain featuresoftheinventionaregparticularlyvapplica ble :to ty writers adaptedtcwri-te. on surfaces such as therinoplastic material and other mate.- nial upon which it, ispdiificult to -form type impressions with the ordinary typewriter;

In t-he past considerable vdiiiioulty has been experienced in forming printediimpressionsof type onthermoplasticgmaterial. I-Iowevei:,v it has been found possible to formfiuch impressions by {the use of-hea ted type together-'with'a specially constructed type ribbon. The i-nventi ziiaisparticularly applicable ton typewriter O the i kn in the trade as :the d arityper the typewriter shown in :the accompanyin drawin s and 01 described herein =being 'iparticularlyizadapted for typing err-flexible plastic (tubing :Suchas that-sold under the trade-name of Vinylitm 1 An object of this invention isvto nlfo lide aitypewriter having means ,tO heat the t pe.

Another object ofithecimzention/ist0 provide ,a typewriter having means -;to heat the :material to betyped on and the ribbon; prior to the printing operation;

Another "object of-:the.1inventionwis :to. provide controls for the type+and-materialheatingmeans in order to regulate thezdegree ofeheatzin accorde ance with .the ;chai:a'cter.:of the-material rbeing typed on and the size-:ofthe typeand to prevent overheating oftrthe type and the -:material :With consequent damage thereto.

:Another objectohthe invention is to rovide a structure for typewriter ,"carriages ca pable of holding elongatedstrands "of material-in position fortypingthere'on.

A-further object oivthe invention is tor-generally im rove typewriters Y Still r further ob jects and advantages of the 'im vention will appear las the description zproceeds;

My invention isrdefinedinthe-appended claims. In the-claimsas welll'as in the:descriptioniparts are identified by "specific .name's 'forconvenience and such nomenclature i's'ii'nten'ded 'togbes'as is eneric in its applicatio'nto sim'il-arparts as therprior art will permit.- Theibest'iorm-i-nawhichflihave contemplated-applying myiinventionrisdllust :ated in the accompanying diagrammatic drawings forming part of ithis specification in-which:

Fig. 1 is a top pla nsview;oratherrearspoiitiomof the typewriter, including the carbiagfiiand the t pe,"tubingi-beingashewn i d3 $itiQnfiQ rece ingitypelimpressionst 3 l 1 na ,2 isis ni ht's-side: e evation ofro porti n-o the typewriter fshowminz-Fig. l pozne pftthe heing omittedt for n varitysoi rthe ,narts odenriloed.

Fig.3 .isa rightside elevation of the type-heating coils and associated parts at thelprinting point.

Fig.- 4 isa top plan view showing the heating unit thetypeishuttle heing'indicated.

Fig. 5 is a-vertical section of the heating unit taken on-the line5.5 of Fig. 4.

Fig. 6 is a vertical section of the heating-unit taken vonthe line lie-.6 of Fig. 4.

-Fig. '7 is .a schematic wiring diagram of the electricalsconnections.

?he present invention will be described as ap plied to a typewriter of the type known Y-inthe trade-as a VarityDer, although the invention is capable with some modification of being applied equally-well to other kinds of typewriters; The

Varityper shown in the drawings is a model .A producedhythe Ralph 'C. Coxhead Corporation, modified as hereinafter described, but otherwise a 'standa-rd .eommercialtrnachineold in theart.

The typewriter .shown and described has been designed particularly for permanent typing upon flexible small diameter Vinylite tubing of the --type.comm only used asterminal insulation forrelectrical oonneetions. It is desirable to hav e the terminalinsulation of complicated electrical wiring so marked ;-that the individual Wires may bereadily identified at any-later time. Accordingly hytyping appropriate characters on Vinylite ptubing and subsequently cutting the tubing into short lengths positionable at terminal endings of Wiring, -;a permanent positive means of identifying thewiring is provided. However, a typewriterembodying'this invention is capable of amultiplicity of otheruses as :well as typingon such-tubing.

In-.= Fig. .1,=atop plan view of the modified con- ;ventional typewriter i shown. The typewriter hasa parriage generally ,indicated as =-I I which'is mounted onrarguide fl 2. (see Fig. :2) for transverse movement vin the conventional manner past a common printing ,ipoint M, The carriage H is oneratively associated with suitable conventional mechanism-not shownyfor progressing it past the printingpoint-M- as the i-ndividual typesel-ecting levers,- not shown, are actuated; effecting the, typingoperatic m; An anvil I5,= -fixed to the frame- Hi oi the typewriter has tone or more shuttles H, carrying-:embossed type, mounted. thereon ifOI movementabeutithe periphery of the-anvil under control of type lgeysforpresenting-selected characters of type -at the printing point M. A hammer =1 L9 ,is actuated Joy-a conventional mechanism, not shown, lto drive thematerial 2,6, vhere shown as a. flexibl,ef6 l1be,; gfi hee-e1act type Chg-,1-

ribbon shield 22 is interposed between; the ma- The shield 22 has an terial 29 and the ribbon 2 I. aperture at the printing point to permit the material 29 to contact the ribbon at'a point opposite,

the selected type on type shuttle I1, the shield 22 serving to protect the material 29 from marking by the ribbon 2| elsewhere than at the print ing point I4.

The ribbon shield 22 i conventionally mounted on arms 24 and 25 which are fixed in a frame 26 pivoted to the top plate 21' of the typewriter. This general organization of hammer, type shuttle, ribbon and type shield is old in the art and is shown and described more completely in Patent 2,007,229 of July 9, 1935, issued to Frank H. Trego, and 1,936,594 of November 28, 1933, issued to Charles A. Fuchs, to which reference isjmade for a more complete disclosure.

The material 20 is held in position on the car- I riage II by a pair of clamps 29 and 30. clamps 29 and 39 are secured for common operation by means of upstanding lower flanges 3| and 32 to a transverse rod 34 which is journalled The in b'rackets and 36 mounted on a portion of the carriage II. Collars 31, 31 are fixed to the transverse rod 34 adjacent brackets 35 and 36 to retain the rod 34 against longitudinal movement. Arms 39 project from the rear portion of the collars 31, each of which may comprise a relatively long screw threadedly engaged in the collar 31. A spring 45, see Fig. 2, is attached to the rear end of each of the arms 39, the Opposite ends of the springs being anchored as by fixed screws 4|.

The effect of the springs 49, 40 is'to urge the rod 34 and clamps 29 and 30 in a clockwise direction as viewed in Fig. 2, urging the upper ends 42 and 44 of clamps 29 and 30 respectively toward clampf ing abutments 45 and 46 of the carriage." A' mana ually operable lever 41 may be fixed to an end of:

the rod 34 to turn the rod against the bias of springs 40 in order to withdraw the clamps and thereby release the tubing; Lever 41 preferably lies along one end of the carriage II and terminates ina flanged end 49 adapted to be manipu l ated by the typist. Accordingly, work may be inserted in the carriage o withdrawn therefrom by turning the'lever 4! counterclockwise as viewed 'in-Fig. 2, thus withdrawing the clamps 29 and 39 from holding position, after which the Work to be held can be laid within the two clamps or withdrawn therefrom and the lever 41 released, the clamps serving to engage the strip material 2|! 'andmaintain it in a fixed position on the carriage I for passage past the printing point I4.

' A heating unit generally indicated as 59 and comprising several individual coils, hereinafter described, is positioned adjacent the type shuttle I! and supported by the frame I6 of the typewriter for applying heat for the printing operation. The heating unit 50 is preferably comprised in part of a flat arcuate segment 5|, see Fig. 4. The segment 5| may be formed of a core 52 'of heat resistant electrical insulating material cal resistance 'wire' 54, such as Nichrome wire.

.flanges 63 and 64 adapted to be secured to the arcuate segment 5|. Cores 6| and 62 may be covered with extended facings 65 of heat resistant electrical insulation projecting beyond the margins of the cores. The segments 59 and 60 are also wound with spaced turns of a single electrical resistance wire 66 and 61 of Nichrome or other suitable material, thereby forming heating coils. The wires 54, 66 and 61 are preferably connected in a single electrical series connection leading from'terminal 68 to terminal 69 positioned at the extremities of the segment 5| and are electrically insulated from the typing mechanism. The segments 5|, 59 and 60 are of the propercurvature and otherwise adapted to fit immediately below and about the anvil I5 and type shuttle I! of the typewriter and serve to heat these parts, principally by convection and radiation. In addition, the extended midportion 51 of the segment 5| is adapted to underlie the front edge of the carriage I I and heat the material 29 upon'which the type impression is to be made immediately prior to the time it reaches the printing point, thus aiding in the printing operation, as will be hereinafter described. Further, the ribbon 2| is also heated by the heating unit 59 as it is progressed to the printing point I4. I

A guide 10 is fixed to a portion of the frame I6 of the typewriter below the printing point I4 and the heating unit 50 and is projected rearwardly of the typewriter. beyond the end of the segment 5|. The lower portion of the guide I0 serves to reflect radiant heat from the heating unit 50'upwardly onto the anvil I5 and shuttle IT in order'to aid in heating these parts. Guide ID has a bifurcated end portion II comprising 2 spaced fingers, one positioned on each side of theprinting point, and bent forward to a point adjacent the ribbon shield 22. The extremities of the fingers "II aid in maintaining the material 20 in proper position at the printing point I 4 and serve as guides upon which the material 20 may slide when forced forwardly into contact with the ribbon 2| during the printing operation. The space between the two fingers II is sufficient topermit the hammer I9 to complete the printing stroke. Additionally, the guide 10 which receives heat from the heating unit 50 serves to conduct the heat to the material 20 in order to heat the material prior to progressing it to the printing point. The fingers II of the guide 10 at the printing point are slightly higher than'the normal position of the material 2|! lying within the clamps 29 and 39 in order to assure that the strip of materialwill remain in contact with the guide 10, any tension in the material 20 serving to hold it in firm contact with the guide.

The ribbon 2| is-a thermosensitive type ribbon that is capable of forming type impressions only'when thetype, the ribbon and the material to be typed on, orat least one of them, are at an elevated temperature so "as to soften the rib amaesr bon' pigment for the 30f. sthe materiahnr both, for the: sprinting opeisationr A single use thermosensitive typeribbons'lmown the trade as branding tape, "which discarded after one passagepast the printingpointhasaiproved satisfactory .for this purpose."

The ribbonrfeed mechanism-anonprogressing the ribbon 2|. past the printing pointcmay be of any suitable type The nnetshownfissimiilar to that in Patentl2,161,856 :oi June-'13,- .1939,- issued to Ralph CrCoxhead'; to which reference iszrmade for a'more complete disclosure. "Iheiribbon-ll is supplied from a :conventionalfspoOl 12150031186 at the left of the machine after 'whichftt' is passed about the guide rollflfi. The ribbon+2=| thenpassed through a, ribbon :guide: 14' past the: :printing point 1M adjacent i theribbonnshield 22, through a second ribbonxguide :1 B and :between the ribbon feed rolls M andJI after 'whichithe ribbon is passed through athird: ribbon: guide :18 and discharged at the-right :side-rof thentype- Writer.

The degree of heat required: depends ta some extent upon thesizeof the type characters-being used and upon the particular composition :of material upon which. ztheiitype impressions :ane to be formed. Variation in heatin-gis provided for by a conventional rh'eost'at 19*mounted at the rear of the typewriter and. connected in electrio-a1 series with the .Iesis-tance wires; :of the heating unit 58. The rheostat 19.15 of the conventional vaniable resistance type, the amount of electrical current supplied to the heat-ingunit 50 being regulated'by setting .theuknob 80 .to various positions.

To further control. the supply ofielectrical err.- ergy to the heatingtunit 550;a eonventionahofi and on electrical snap .switchilli l is mountedon frame 16 and connected in series with'' th'e-rheestat 19 and. the h'eatingl u nittl- .I-n:a'd dition-,- as a. safety precaution, lathermostatifl is positioned onthe underside of the guide- The thermostat 82 ma bezof the enclosed conventional ibimetalli'c element type 'containingase't fo-f electrical contact points, theaction 'ofthe thermostat being to open the electrical circuit passing through the :heating uni-tifl upon the guide: 10 attaining an excessively high temperature;- thermostat is preferably set to-open the circuit upon vreaching a temperature ofapprox im l y 275 F. and is in the nature of a safety d e i'ce only, not being operative unless 'therheostatm is set so as to supplyanexcessive amount of electrical energy, a11- factors-being considered,

thus producing excessive heating of 'the shuttle l1 and the material 28 to -*be typed The electrical connections may be made-- as shown in Fig. 7, the electrical'systembein-g'com nected to a suitable source of electrical power, customarily 110 volt alternating current; The same source of power maybeused that is'used to drive the escapement and hammer resetting spring re-windin=g motor Bi-I,'-'-si 1cli-a motor being customarily used in this classoi typewriters and more particularly described i-n the- U." 8-; Patent 1,656,460 of January I7, 1 928;- issued to Arthur S. Wheeler, '00- which reference is made for a complete description thereof; 1

It will be apparent from a-study of 7 that by maintaining the electrical switcl'r tl in an off-position the heating unitGU-is not energized. By substituting a *conventional ribbon "for the'branding tape previously-described,*-itis possible to use the same machine for j conventional typing "on strands of material and'the like which eciazy'zpeuanf nSuahribbQnM Accordingly, itui camhe stritablyiengaged-bythe clamps 2.9 and-Mi ;If;: desired", ar-reel M imayqbe mountedwupon thenleft-itrand tend 11f E the "carriage a! I "mg order tonhold the-supply of. .Sllllfifld'PiIlfiliilfi t -upon which the typingioperatiem is :tobe" gperiOFlRflfi; By so monntingzsupply meet-.8 becwithfirawn afizom: the meet without cutting after the typing; operation is rperformed-;ci-thereby resulting in an economy oiu-material inflisrxmoh'ras the i-materia'l :cannotreceive piiintedvimpressions azdfiaoentethe ends nf-tlrescarniage wherezit is 100M eredby the mlamps .zzsiiand "30. in suclmamodificatiomzzit ise'mecessary to mount the meet 8min suehixmanner :asanotto Antertere with. the :travel ioififiheicarniage rtotherightl: v v 1mm order: "12011 01 1113 rtype characters along" the center; xaf'iditferentssizes tefxtubingior otheristrand material, the: guide =z'lifl 'may me madeadjustable to regulntecthe height ofaith'e: :fingers relative te ztheaprimu ng. point-{lit bEiXligZeIIECGSSEEI'Y; to ilower thefiimgererflt for: target sizeseoftubingn Ad instability, i be secured-shy @torming the everticalzipontionwot:eaclfof the 'sfi-n'gersi :H- fi'li'"?bWD overlappingsezpiecee clampedv together-:1 y

smut andabolt passing through :a vertieal el'otm' n oneirpiece tand iacl hol'e in rather: overlapping piece-1.11331 alcosen @its nutandibolt; each of the fingers may :be: La'dj-usted.itoctherpreper height toiguide: thezmaterialii'fldcoathe 'zprinting pointrl-id ses-aesto t'fiorma'stherzprinted impressionialon'gethe center-thereof; lAfter'adjustment is completed; i'ihEtl'lWtUEil'Id bolt- 85 tnaybemetigl i terredz @nce or 'hothrofliziihe elampsri'ilfiandaiwz? may made:sadjustableiinflzheight rto-znccomniodate rdi'i e iieizent :siaee' ff ftubin v=adjustabtl securingna inenibenm. to thezfil'ometacemf *thrrclamn by means'ioi 4 linmbscrewna :threadedliy-zengaged inethea i clamp 2 3 0: andepas'singr: through -:a; "vertical slot in'rth'e member: 6; iAwrearwardiy turned flange-enter: member a; B s-er veseas a guide :ror" sup portim'gzztheunateri'al Br prior ltoaengagementof the iclamprallitherewithid 1 v f 4 While the inventionw-shasnibeenJdescribed ism cifiealiy :as';-:applied: to: a typewriten'fontypmg upnnWVinylite! tubinggriit fie equal-1y eapabl 30f typing iupon brother (plats-tip :-su-r fenes,iv v and acorns positions inf: material whichcdifficulty-sie "expat rien'cedlsi .iwithizthe conventionah eate understooarthat therxmyention mot-confine m, suchfltypingioperationsgbut i limited-lonl yzas set ferth: mithe accompanyingc1 aims=..;. v

What I claim is: i 11.? In axatypewriter; zmeans rfori' seIectiveIy presenting-type atr a common printing-point, means fer ipregressingmaterial'to -receive type impres sites-past theprint-ing poi nt, means including 'a thermosens-itive type wri bbon interposed between the type and the materiaiduring the printing on eratierr fo' r forming aprintel 'impression of tl-ie type-*on sai" inateriala ane means for-heating said type and sa TmateriaPprior-to' formlng the printed impression; I '2.-1r'ia typewriter, meansfor selectively presenting *type ata -commenprinting point, means for progres sing material te'recei-ve type impressions past th printingpoint, mean'S -incIuiin a thermosensitive-type ribbon" interposed between the-ty e and thematerial" during the pfinting op eration for forming at-printed impression ofthe type on said material; and" means for *m'aint] h ing said typeat a prelietermined elevated tem perature and heating said materiai as it-"ap preaches theptinting-point:- I "3 ei-typewriter; means' i'ei eeieetiveryw themater-ial-gcan senting type at a common printing point, means forprogressing material to receive type impressions past the printing point, means including a thermosensitive type ribbon interposed between the type and the material during the printing operation for forming a printed impression of the type on said material, and electrical means for heating said type and said-material prior to forming the printed impression. 1

4. In a typewriter, means for selectively'presenting type at a common printing point,rmeans for progressing material toreceivetype impressions past the printing point, means including a thermosensitive type ribbon interposed between the type and the material during the printing operation for forming a printed impression of the type on said material, and an electrical resistance heating element for heating said type and said material prior to forming a printed impression.

5. ma typewriter, means for selectively presenting type at a common'printing point, means for progressing material to receive type impressions past the printing point, means including a thermosensitive type ribbon interposed between the type and the material during the printing operation for 'forming a printed impression of the type on said material, andan electrical resistance heating element positioned adjacent the printing point for maintaining said type at a predetermined elevated temperature and heating said material as it approaches the printing point.

6. A typewriter carriage for progressing strip material. past a typewriter printing point in the direction of carriage movement, said carriage comprising: clamps mounted adjacent each end of the carriage and adapted to resiliently engage a cooperating portion of the carriage, strip ma: terial being positionable therebetween, means operable for disengaging saidclamps and a reel mounted at the left end of said carriage and adapted to hold a supply of strip material. 1

'7. In a typewriter, means for selectively presenting type at a common printing point, means for progressing material to receive type impressions past the printing point, means including a thermosensitive type ribbon interposed between the type and thematerial duringthe printing operation for formin a printed impression of the type on said material, and a thermostatically controlled electrical resistance heating element for maintaining said type at an elevated temperature and heating the material prior to the printing operation. V l

8. In a typewriter having a plurality of type symbols embossed on a common arcuate. member and oscillatable on a vertical axis past a single printing point, means for selectively positioning the type symbolsat the printing point, means for progressing material to receive typeimpressionspast the printingpoint, means including a thermosensitive type ribbon progressed past the printing point and interposed between the type and the material during the printing operation for forming a printed impression of a type sym- Joel on said material and an electrical resistance heating elementpositioned immediately below said type symbols forheatingthereof.

9. Ina typewrit rhaving a plurality of type symbols positionable at a single printing point, means for selectively positioning the type symbols atthe printing point, means for progressing mate rial toreceive type impressions past the printing point, means ,for iorming a printed impression of a selected type synrrbol or said material, said last-ment oned me ns in din tn rm s n tive ty'pe ribbonprogressed-past the printing point and interposed between the-typeand the material during the :printingioperation, and electrical resistance heatingmeans positioned immediately below saidtype symbols and below said material adjacent to the printing-point for maintaining-said type symbolsat an elevated temperature and heating said material in. advance of forming the printed impression thereon.

, l0. Ina typewriter having a plurality of type symbols embossed on a common arcuate member and oscillatable past a Single printing point, means for selectively positioning the type symbols at the printing point, means for progressing material to receive type impressions past the printing point, means forsforming a printed impression of a selecte'd'type symbol on said material, said last-mentioned means including a thermosensitive' type ribb'onprogressed past the printing point, and an'nelectrical resistance heating element positioned immediately below said type symbols and extending below said type ribbon and 'said materialiinthe path of their advance to the printing .point for maintaining said type symbols at an elevated temperature and heating said ribbon and saidmaterial in advance of the printingoperationy 1:;

11. In a typewriter having a plurality of type symbols embossed onca common arcuate member and oscillatable ona vertical axis past a single printing point, means for selectively positioning the type symbols atzthe printing point, means for progressing material to receive type impressions past theprinting point,'means,including a thermosensitive type ribbon progressed past the printing point and interposed between the type and the material during the printing operation, for forming a printed impression of a type symbol on said material, and an electrical resistance heating element positioned immediately below the type member and extending beneath the type ribbon adjacent the printing point for heating the type symbols and the type ribbon.

12. In a typewriter having a plurality of type symbols embossed on a common arcuate member and oscillatable on a vertical axis past a single printing point,-means for selectively positioning the type symbols at the printing point, means for progressing material to receive type impressions past the printing point, means, including a thermosensitive type ribbon progressed pastthe printing point and interposed between thetype and the material during the printing operation, for forming a printed impression of a type symbol on said material, and an electrical resistance heating element positioned immediately below the type member and extending beneath the material and the type ribbon adjacent the printing point for heating the type symbols, the material, and the type ribbon.

13. A typewriter having amovable carriage for supporting material to be typed on, means for progressing the carriage past a common printing point, an anvil, a shuttle slidable along the surface of the anviland having a face embossed with type characters selectively indexable at the printing point, means, including a thermosensitive type ribbon, for forming a printed impression of th indexed type-on the material supported by the carriage, and an electric resistance heating element extending along at least a portion of the face of the type shuttle exterior of the anvil and shuttle forheating the type to condition it for forming a type, impression. I

14, A typewriter having a movable carriage.

for supporting material to be typed on, means for progressing the carriage past a common printing point, an anvil, a shuttle slidable along the surface of the anvil and having a face embossed with type characters selectively indexable at the printing point, means, including 'a thermosensitive type ribbon, for forming a printed impression of the indexed type on the material supported by the carriage, and an electric resistance heating element extending along the face of the type shuttle at each side of the printing point and exterior of the anvil and shuttle for heating the type to condition it for forming a type impression.

HENRY RESCH.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 

